Patent GB-1063773-A (GB)
Title: Photographic camera
IPC: G03B15/04
Filed: 1964-02-27
Abstract: 1,063,773. Cameras with flash attachments. EASTMAN KODAK CO. Feb. 27, 1964 [Feb. 28, 1963], No.8161/64. Heading G2A. A camera shutter has a part which moves when an exposure is made, and which movement can be altered to provide different shutter speeds; a stop member is movable between a first position wherein it restricts the said movement to some extent, and a further position wherein it does not affect the movement at all; the stop member is moved to one position or the other by the sliding of a flash attachment from a non-operative to an operative position. In the form shown, the shutter consists of a pivoted blade 17 biased by a spring 18 into engagement with a stop 19 on a mounting plate 16 forming part of the camera body. A lug 21 on blade 17 is struck by a tensioned lever 22, when released, to impart a clockwise movement and so effect the exposure. Said release is caused by depressing a finger lever 25, which is pivoted at one end 24 to plate 16, and which carries an arm 27 normally obstructing lever 22; when lever 25 is pressed, arm 27 moves out of engagement with lever 22 and so actuates the shutter release. A flash holder 37 is built into the camera, and can be raised from the closed inoperative position of Fig. 1 (not shown) to the extended operative position of Fig. 2. The holder has a semi-cylindrical reflector 38, and carries a number of brackets, Figs. (not shown) 9, 10, 11. These have arms acting as levers, contacts, and spring elements for operating the flash, locating the holder, and co-operating with the shutter. The batteries are housed in a compartment 28 of the camera. At the end of finger lever 25 is a contact 35, insulated from the lever itself. When the lever is pressed, contact 35 moves into contact with the spring end 34 of a contact member 33 whose other end 32 leads to a battery terminal. When the flash holder is raised to the operative position a spring arm 56 on one of the brackets comes into engagement with contact 35, and so, when lever 25 is depressed to actuate the shutter, closes the battery circuit to energize the flash. When the holder is pushed into its closed inoperative position, the energizing circuit is broken, so that an unfired flash bulb may be left in the holder while an exposure is made. Fig. 12 shows a spring member 68 for acting as a shutter stop and whose shape and disposition govern the exposure time. This is secured to the camera body by spring fingers 69, and has an arm 72 with a curled-over end 73 which extends towards the pivot of shutter blade 17. The amount of play in spring member 68 is such that the curled end 73 can be pushed into or out of the path of lug 21 on blade 17 as the latter pivots. In the Fig 2 position, it is free and unstressed, so that the end 73 takes up a retracted position in which it remains out of the path of lug 21 as the shutter pivots to effect an exposure. When the flash holder is pushed back into its closed position, however Fig.1 (not shown), this movement causes spring member 68 to be engaged and pushed towards the shutter blade, so that curled end 73 is now in the path of lug 21. Thus as blade 17 now pivots, lug 21 is intercepted by spring arm 72, which acts as a shock absorber, and also acts as a restoring force to return blade 17 to its original position more rapidly, so giving a shorter exposure time. By curling over the end of arm 72 to a greater or lesser degree, the effective length of arm 72 is altered, so providing a means of varying the shutter speed.